Trazyn the Infinite, Empowered Autogenerator, and Crab Umbra

Prerequisites

• Trazyn the Infinite on the battlefield
• Empowered Autogenerator in the graveyard
• Crab Umbra on the battlefield

Steps

1. Activate Trazyn using Empowered Autogenerator's ability by tapping it, putting a charge counter on Trazyn and adding for each charge counter on Trazyn
2. Activate Crab Umbra by paying , untapping Trazyn
3. Repeat

Results

• Infinite colored mana